ROTJ detonator charges

Some screen shots i took. Actually looks like another style slider knob in the hole. The groove on the side would be on the front of the slider. Seems to have a V shape on top.Just a guess though. I also found some lenses in my stash. The dome one is 9.75mm ish and the tall one is 9.25mm ish. The ones on the prop are bigger then 5mm if you compare it to the slider knob. A couple pics of them lit up at different exposure levels.
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Any idea what screw head size Is holding the photomultiplier in place?
My estimate is 2 mm (just eyeballing) - 3 mm is 1/8th inch and I am using a lot of 3 mm aluminum in building my hoth blaster. Those heads look thinner than this, but 1 mm is probably too small

No, these screw heads are much larger! I measure 4 mm diameter head in my 3D file.
 
I have the feeling it's completely (chromed) metal like the side louvers and the bell on top.
Can it be another part from the photomultiplier tube bent and screwed in place?
 
No, these screw heads are much larger! I measure 4 mm diameter head in my 3D file.


Was this likely to have been made in the UK at Elstree, I'm guessing so with all the talk of the linear slider knobs. So bearing that in mind would it be more likely that they were using something like a 6BA or 8BA roundhead screws instead of metric stuff.
 
Looking at all the images I'm beginning to think that the top center of the cylinder is a separate piece added on.
Possibly from inside or from the bottom.
Look at the seam edges, there appear to be rough gaps.
The screen caps (post 222) look almost jagged.
The piece is almost "floating" at the top with the rest hollow for electronics and greeblies.

The pic of a page from a book also shows threading in the holes (possibly from the greeblies).
 
Looking at all the images I'm beginning to think that the top center of the cylinder is a separate piece added on.
Possibly from inside or from the bottom.
Look at the seam edges, there appear to be rough gaps.
The screen caps (post 222) look almost jagged.
The piece is almost "floating" at the top with the rest hollow for electronics and greeblies.

The pic of a page from a book also shows threading in the holes (possibly from the greeblies).

I was thinking the same thing. It looks like its a separate piece.
 
Was this likely to have been made in the UK at Elstree, I'm guessing so with all the talk of the linear slider knobs. So bearing that in mind would it be more likely that they were using something like a 6BA or 8BA roundhead screws instead of metric stuff.

Yes, I guess. Although screwing into plastic or resin is easier with sheet metal screws. So they are called slotted pan head sheet metal screws.
 
I was thinking the same thing. It looks like its a separate piece.

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I do wonder as well
this looks like some good ol’ fashioned prop finagling to me

Looking at all the images I'm beginning to think that the top center of the cylinder is a separate piece added on.
Possibly from inside or from the bottom.
Look at the seam edges, there appear to be rough gaps.
The screen caps (post 222) look almost jagged.
The piece is almost "floating" at the top with the rest hollow for electronics and greeblies.

The pic of a page from a book also shows threading in the holes (possibly from the greeblies).

I noticed this to.

2020-08-26 08.10.37.jpg


This is our current prop.
On the other side it looks perfectly good.

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This image is from another prop and on one side it shows the same clear groove.

So even though this groove could have existed in every product it's very unlikely. So maybe these are castings from the same assembled original. It's a lot of work for such a series of props!
 
Something weird is going on next to the slider knob on our side. almost like theres a wire and some gray thing poking up
 
Something weird is going on next to the slider knob on our side. almost like theres a wire and some gray thing poking up

That's the inside you're seeing. The top is only thin. I wonder what's keeping the slider knobs up in place.
 
I am more and more convinced that the holes in the base were not drilled but molded in the original part. In my 3D model I found that the inner ridges in the bottom have a draft angle and that the holes are intentionally passing through these surfaces. It's so perfect that I don't think it could have been done by hand and it wouldn't have made sense. Also: they are perfectly equally divided 4x in a circle. And the outer rows are 12 degrees on both sides of the center row.

Here you see my overlay:

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I am more and more convinced that the holes in the base were not drilled but molded in the original part. In my 3D model I found that the inner ridges in the bottom have a draft angle and that the holes are intentionally passing through these surfaces. It's so perfect that I don't think it could have been done by hand and it wouldn't have made sense. Also: they are perfectly equally divided 4x in a circle. And the outer rows are 12 degrees on both sides of the center row.

The placement of the holes have always been puzzling as they look well placed but markings around them indicated to me that they were an after thought. I figured they used the steps on the inside as a guide as to where to drill. Drilling from the bottom up, not top down. The only thing that seems to make sense in my mind is that the holes existed but they were clogged with paint or something else and they felt a need to drill the holes out to clear them. Otherwise I just don't know why the paint would be bare in those weird grooves that look like they were made bu drilling holes.
 
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